package cn._51doit.flink;

import org.apache.flink.api.common.functions.FlatMapFunction;
import org.apache.flink.api.common.functions.MapFunction;
import org.apache.flink.api.java.tuple.Tuple;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.streaming.api.datastream.DataStreamSource;
import org.apache.flink.streaming.api.datastream.KeyedStream;
import org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.util.Collector;

public class StreamWordCountV2 {

    public static void main(String[] args) throws Exception {

        //创建本地指定的Env，并且带WebUI的
        Configuration configuration = new Configuration();
        configuration.setInteger("rest.port", 8081);
        StreamExecutionEnvironment env = StreamExecutionEnvironment.createLocalEnvironmentWithWebUI(configuration);
        //1.创建执行环境
        //StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        //2.调用Evn的Source方法，创建抽象数据集
        DataStreamSource<String> lines = env.socketTextStream(args[0], Integer.parseInt(args[1]));
        //3.调用Transformation（s）
        lines.flatMap(new LineSplitor())
                .keyBy(0)
                .sum(1)
                .print();

        //5.执行并挂起
        env.execute();


    }

    public static class LineSplitor implements FlatMapFunction<String, Tuple2<String, Integer>> {

        @Override
        public void flatMap(String in, Collector<Tuple2<String, Integer>> collector) throws Exception {
            String[] words = in.split(" ");
            for (String word : words) {
                collector.collect(Tuple2.of(word, 1));
            }
        }
    }
}
